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1 | |
When light enters from a medium of lower refractive index into a medium of larger refractive index, the path of the light bends toward the normal. |
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| | A) | True |
| | B) | False |
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2 | |
When light crosses a boundary between medium 1 and medium 2, the ratio of v1 to v2 will be the same as the ratio of n1 to n2. |
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| | A) | True |
| | B) | False |
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3 | |
Objects of higher optical density have greater critical angles. |
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| | A) | True |
| | B) | False |
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4 | |
When white light is dispersed by a prism, the smaller-wavelength components are deviated the most. |
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| | A) | True |
| | B) | False |
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5 | |
For total internal reflection, the angle of incidence is equal to the angle of reflection. |
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| | A) | True |
| | B) | False |
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6 | |
When an object in air is viewed from a position under water, the object appears to be farther away than it actually is. |
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| | A) | True |
| | B) | False |
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7 | |
Whenever light enters a denser medium, both the velocity and frequency of the light are reduced. |
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| | A) | True |
| | B) | False |
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8 | |
Whenever light passes through any number of parallel media and finally returns to the original medium, the angle of incidence in the original medium is equal to the angle of emergence. |
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| | A) | True |
| | B) | False |
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9 | |
The critical angle for right-angle prisms should not exceed 45°. |
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| | A) | True |
| | B) | False |
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10 | |
The laterial displacement of light as it passes through a pane of glass is greater when the optical density of the glass is large. |
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| | A) | True |
| | B) | False |
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11 | |
For refraction of light from medium 1 to medium 2, the ratio of sin θ1 to sin θ2 is equal to |
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| | A) | v1/v2 |
| | B) | n1/n2 |
| | C) | λ2/ λ1 |
| | D) | θ1/ θ2 |
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12 | |
The index of refraction for a substance is |
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| | A) | constant |
| | B) | constant for a given wavelength |
| | C) | variable with the speed of light |
| | D) | never constant |
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13 | |
Total internal reflection occurs when the angle of incidence is |
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| | A) | greater than the angle of refraction |
| | B) | equal to the critical angle |
| | C) | greater than the critical angle |
| | D) | greater than 45° |
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14 | |
The refractive index of benzene is 1.5. The velocity of light in benzene is approximately |
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| | A) | 1.5 x 108 m/s |
| | B) | 1.75 x 108 m/s |
| | C) | 2 x 108 m/s |
| | D) | 2.5 x 108 m/s |
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15 | |
Light passes at an angle of incidence of 37° from water to air. The angle of refraction in the air is approximately |
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| | A) | 27° |
| | B) | 53° |
| | C) | 45° |
| | D) | 60° |
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16 | |
Monochromatic green light has a wavelength of 520 nm. The wavelength of this light inside glass of refractive index 1.5 is approximately |
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| | A) | 300 nm |
| | B) | 340 nm |
| | C) | 520 nm |
| | D) | 780 nm |
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17 | |
The critical angle for diamond (n = 2.42) surrounded by air is approximately |
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| | A) | 24° |
| | B) | 35° |
| | C) | 45° |
| | D) | 66° |
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18 | |
A fish is located 2 m from the surface of a small pond. The apparent depth is |
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| | A) | 1.0 m |
| | B) | 1.5 m |
| | C) | 2.0 m |
| | D) | 2.66 m |
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19 | |
Light is incident from water at an angle of 60° into a transparent medium. If the angle of refraction is 30°, the index for the medium is |
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| | A) | 1.15 |
| | B) | 1.5 |
| | C) | 2.3 |
| | D) | 3.1 |
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20 | |
Light travels from air at an angle of incidence of 41°. What will the speed of light in the second medium be if the angle of refraction is 30°? |
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| | A) | 1.5 x 108 m/s |
| | B) | 2.1 x 108 m/s |
| | C) | 2.29 x 108 m/s |
| | D) | 2.5 x 108 m/s |
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21 | |
The of a material is the ratio of the free-space velocity of light to the velocity of light through the material. |
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22 | |
For refraction, the , the , and the all lie in the same plane. |
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23 | |
Whenever light enters glass from air, the remains unchanged, but the and the are reduced. |
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24 | |
Whenever white light enters a prism, it separates into its component . This phenomenon is known as . |
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25 | |
The is the limiting angle of incidence in a denser medium that results in an angle of refraction of 90°. |
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26 | |
Total internal reflection occurs when a light ray from a certain medium is incident upon another medium of optical density at an angle of incidence greater than the . |
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27 | |
According to Snell's law, the ratio of the to the is equal to the ratio of the in the incident medium to the in the refracted medium. |
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28 | |
Right-angle prisms make use of the principle of to deviate the path of light along right angles. |
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29 | |
When objects under water are viewed from the air above the water, the apparent depth is equal to the actual depth times the ratio of to the . |
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30 | |
The minimum value of the index of refraction is . |
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